Exhaust particle removing system for an internal combustion engi

Details Exhaust particle removing system for an internal combustion engi Exhaust particle removing system for an internal combustion engi

1983-12-19

1986-03-11

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60311, F01N 302

Patent

active

045745897

ABSTRACT:
An exhaust passage extends from an internal combustion engine to conduct exhaust from the engine. A filter is disposed in the exhaust passage to filter particles out of the exhaust. A burner is disposed in the exhaust passage upstream of the filter to burn off the particles retained by the filter. A sensor senses the pressure across the filter and generates a signal indicative thereof. Another sensor senses an operating condition of the engine. A first device generates a primary reference signal on the basis of the sensed engine operating condition. A second device samples the pressure signal when the pressure sensor is subject to a zero pressure difference. A third device stores the sampled pressure signal. A fourth device corrects the primary reference signal on the basis of the stored pressure signal and generates a secondary reference signal reflecting the correction. A fifth device compares the pressure signal to the secondary reference signal and generates a signal reflecting the result of the comparison. A sixth device activates the burner on the basis of the comparison signal.

REFERENCES:
patent: 4383431 (1983-05-01), Gelernt
patent: 4424671 (1984-01-01), Tokura
patent: 4462208 (1984-07-01), Hicks

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